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- United States. Division Of Entomology5
- Dryden, James, 1863 4
- Oregon Agricultural College. Department Of College Extension4
- United States. Department Of Agriculture4
- Oregon Agricultural College. Department Of Poultry Husbandry2
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- Olmsted, John Charles1
- Oregon Agricultural College. Extension Service1
- Shepherd, Frank Henry1
- Society Of American Foresters1
- United States. Bureau Of Entomology.1
- United States. Bureau Of Forestry1
- von Schrenk, Hermann, 1873 19531
- Webb, J. L. (Jesse Lee), 1878 19421